Holy.Cow Tab Control Texture

///////////////////////////////////////
/// Resource file

1 DIALOGEX 32, 32, 300, 200
STYLE DS_MODALFRAME |  WS_POPUP |
      WS_VISIBLE | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME
CAPTION "Sample"
FONT 8, "MS Shell Dlg"
BEGIN
    LTEXT "Hello World!",100,7,8,100,10
END

2 DIALOGEX DISCARDABLE  32, 32, 200, 76
STYLE  WS_CHILD | DS_CONTROL
CAPTION "Sample"
FONT 8, "MS Shell Dlg"
BEGIN
 LTEXT "A mumbler is needed.",-1,7,8,100,10
 AUTORADIOBUTTON "Do not &obtain a mumber now",
                 100,17,24,180,10
 AUTORADIOBUTTON "Obtain a mumbler auto&matically",
                 101,17,34,180,10
 AUTORADIOBUTTON "&Enter mumbler manually",
                 102,17,44,180,10
 DEFPUSHBUTTON "OK",IDOK,92,58,50,14
 PUSHBUTTON "Cancel",IDCANCEL,146,58,50,14
END



////////////////////////////////////////
/// Here's the code
#include <windows.h>
#include <windowsx.h>
#include <uxtheme.h>
#include <commctrl.h>

#pragma comment(lib, "uxtheme.lib")
#pragma comment(lib, "comctl32.lib")

#pragma comment(linker, \
    "\"/manifestdependency:type='Win32' "\
    "name='Microsoft.Windows.Common-Controls' "\
    "version='6.0.0.0' "\
    "processorArchitecture='*' "\
    "publicKeyToken='6595b64144ccf1df' "\
    "language='*'\"")

#define  DYNACONTROL_WINDOW   "_ODynaControlWindow_"

HINSTANCE g_hInst = NULL;
HWND g_hDlg = NULL;
HWND g_hWndTab = NULL;
HWND g_hStatic = NULL;
HWND g_hChildDlg = NULL;
HWND g_hCustomPanel = NULL;

INT_PTR CALLBACK DlgProc(HWND hdlg, UINT uMsg,
    WPARAM wParam, LPARAM lParam);

INT_PTR CALLBACK ChildDlgProc(HWND hdlg, UINT uMsg,
    WPARAM wParam, LPARAM lParam);

HRESULT OnSize(HWND hwndTab, LPARAM lParam);

BOOL OnNotify(HWND hwndTab, HWND hwndDisplay, LPARAM lParam);

HWND DoCreateTabControl(HWND hwndParent);

void CenterChildControls();

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
    g_hInst = hInstance;
    return DialogBox(hInstance, MAKEINTRESOURCE(1), 0, DlgProc);
}

INT_PTR CALLBACK DlgProc(HWND hdlg, UINT uMsg,
    WPARAM wParam, LPARAM lParam)
{
    switch (uMsg) {
    case WM_INITDIALOG:
        {
            g_hDlg = hdlg;
            CheckRadioButton(hdlg, 100, 102, 100);

            g_hWndTab = DoCreateTabControl(hdlg);

            g_hStatic = GetDlgItem(hdlg, 100);

            g_hChildDlg = CreateDialog(g_hInst, MAKEINTRESOURCE(2), g_hDlg, ChildDlgProc);
            EnableThemeDialogTexture(g_hChildDlg, ETDT_ENABLETAB);

            WNDCLASS wndcls = {0};
            wndcls.style            = CS_DBLCLKS|CS_HREDRAW|CS_VREDRAW;
            wndcls.lpfnWndProc      = DefWindowProc;
            wndcls.cbClsExtra       = wndcls.cbWndExtra = 0;
            wndcls.hInstance        = g_hInst;
            wndcls.hIcon            = NULL;
            wndcls.hbrBackground    = NULL;
            wndcls.lpszMenuName     = NULL;
            wndcls.lpszClassName    = DYNACONTROL_WINDOW;

            if (RegisterClass(&wndcls))
            {
                g_hCustomPanel = CreateWindowEx(WS_EX_CONTROLPARENT,
                    DYNACONTROL_WINDOW, NULL,
                    WS_CHILD | WS_TABSTOP | WS_GROUP,
                    0, 0, 100, 100,
                    g_hDlg,
                    NULL,
                    g_hInst,
                    NULL
                    );
                if ( g_hCustomPanel )
                {
                    HWND hStatic = CreateWindow(WC_STATIC, "My Panel", WS_CHILD|WS_VISIBLE|WS_GROUP|SS_LEFT,
                        10, 10, 100, 30,
                        g_hCustomPanel,
                        NULL, g_hInst, NULL);
                    EnableThemeDialogTexture(g_hCustomPanel, ETDT_ENABLETAB);
                }
            }
            CenterChildControls();
        }
        return TRUE;
    case WM_SIZE:
        return OnSize(g_hWndTab, lParam);
    case WM_NOTIFY:
        return OnNotify(g_hWndTab, g_hStatic, lParam);
    case WM_COMMAND:
        switch (GET_WM_COMMAND_ID(wParam, lParam)) {
        case IDOK:
            break;
        case IDCANCEL:
            EndDialog(hdlg, -1);
            break;
        }
    }
    return FALSE;
}

INT_PTR CALLBACK ChildDlgProc(HWND hdlg, UINT uMsg,
    WPARAM wParam, LPARAM lParam)
{
    switch (uMsg) {
    case WM_INITDIALOG:
        return TRUE;
    }
    return FALSE;
}

BOOL OnNotify(HWND hwndTab, HWND hwndDisplay, LPARAM lParam)
{
    switch (((LPNMHDR)lParam)->code)
    {
    case TCN_SELCHANGING:
        {
            // Return FALSE to allow the selection to change.
            return FALSE;
        }
    case TCN_SELCHANGE:
        {
            int iPage = TabCtrl_GetCurSel(hwndTab);

            ShowWindow(g_hStatic, 0 == iPage);
            ShowWindow(g_hChildDlg, 1 == iPage);
            ShowWindow(g_hCustomPanel, 2 == iPage);
            break;
        }
    }
    return TRUE;
}

void CenterControl(HWND hWnd, const RECT& rcTab)
{
    RECT rc;
    GetWindowRect(hWnd, &rc);
    ScreenToClient(g_hDlg, (POINT*)&rc);
    ScreenToClient(g_hDlg, ((POINT*)&rc)+1);
    SetWindowPos(hWnd, HWND_TOP,
        rcTab.left+(rcTab.right-rcTab.left-(rc.right-rc.left))/2,
        rcTab.top+(rcTab.bottom-rcTab.top-(rc.bottom-rc.top))/2,
        -1, -1, SWP_NOSIZE);
}

void CenterChildControls()
{
    // Center the static control
    RECT rcTab;
    GetWindowRect(g_hWndTab, &rcTab);
    ScreenToClient(g_hDlg, (POINT*)&rcTab);
    ScreenToClient(g_hDlg, ((POINT*)&rcTab)+1);
    TabCtrl_AdjustRect(g_hWndTab, FALSE, &rcTab);

    CenterControl(g_hStatic, rcTab);
    CenterControl(g_hChildDlg, rcTab);
    CenterControl(g_hCustomPanel, rcTab);
}

#define TAB_GAP_TO_DLG  20

HRESULT OnSize(HWND hwndTab, LPARAM lParam)
{
    if (hwndTab == NULL)
        return E_INVALIDARG;

    // Resize the tab control to fit the client are of main window.
    if (!SetWindowPos(hwndTab, HWND_TOP, TAB_GAP_TO_DLG, TAB_GAP_TO_DLG, GET_X_LPARAM(lParam)-TAB_GAP_TO_DLG*2, GET_Y_LPARAM(lParam)-TAB_GAP_TO_DLG*2, SWP_SHOWWINDOW))
        return E_FAIL;

    CenterChildControls();

    return S_OK;
}

#define DAYS_IN_WEEK 7

HWND DoCreateTabControl(HWND hwndParent)
{
    RECT rcClient;
    INITCOMMONCONTROLSEX icex;
    HWND hwndTab;
    TCITEM tie;
    int i;

    // Initialize common controls.
    icex.dwSize = sizeof(INITCOMMONCONTROLSEX);
    icex.dwICC = ICC_TAB_CLASSES;
    InitCommonControlsEx(&icex);

    GetClientRect(hwndParent, &rcClient);
    hwndTab = CreateWindow(WC_TABCONTROL, "",
        WS_CHILD | WS_CLIPSIBLINGS | WS_VISIBLE,
        TAB_GAP_TO_DLG, TAB_GAP_TO_DLG, rcClient.right-TAB_GAP_TO_DLG*2, rcClient.bottom-TAB_GAP_TO_DLG*2,
        hwndParent, NULL, g_hInst, NULL);
    if (hwndTab == NULL)
    {
        return NULL;
    }

    // Add tabs for each day of the week.
    tie.mask = TCIF_TEXT | TCIF_IMAGE;
    tie.iImage = -1;

    TCHAR* arrTabItems[] = {"No child dialog", "Child dialog", "Custom panel"};

    for (i = 0; i < _countof(arrTabItems); i++)
    {
        tie.pszText = arrTabItems[i];
        if (TabCtrl_InsertItem(hwndTab, i, &tie) == -1)
        {
            DestroyWindow(hwndTab);
            return NULL;
        }
    }
    return hwndTab;
}